I would check on the Remote Scheduler 'recent activity' screen to see the last time your Humax contacted it, although there is a 'Last seen 4:40am on Friday 15th March' in red at the top of your screen so maybe there is another problem
I ran the diskpush diagnostic yesterday, plus reboot, and waited overnight before checking the disk contents on RS again. My Humax was last seen at 3:40 this morning as expected but the disk contents are still "as at 2:11 am on Wednesday, 6th March 2013".
The server must be having problems with the disk contents list that your box is uploading for some reason. Can you let me know the MAC address of your box (by private message) and I will look into it for you.